Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dac cong cho snippets" » "cac cong cho snippets", "duc cong cho snippets", "dai cong cho snippets", "dac dong cho snippets", "dac cong co snippets", "dac rong cho snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dac cong cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dac cong cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dac cong cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dac cong cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.